Celiac disease (CD) is an autoimmune gluten-dependent enteropathy characterized by atrophy of intestinal villi that improves after gluten-free diet (GFD). CD is often associated with extra-intestinal manifestations; among them, several skin diseases are described in CD patients. The present review reports all CD-associated skin manifestations described in the literature and tries to analyze the possible mechanisms involved in this association. The opportunity to evaluate the possible presence of CD in patients affected by skin disorders is discussed.

Background: Several skin disorders are present in patients affected by coeliac disease (CD) – among them, psoriasis has been described. However, at present the relationship between CD and psoriasis remains controversial since there are few and contrasting data on this topic. Method: Here we describe a case of psoriasis in a CD patient not responding to specific therapies for psoriasis. Result: The regression of skin lesions after gluten-free diet (GFD) was evident in a short time. Conclusion: The present case supports the association between CD and psoriasis and the concept that psoriasis in CD patients can be improved by GFD. Future studies are needed to clarify the possible mechanisms involved in this association.

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We describe a case of classic Kaposi’s sarcoma (KS) in an Italian HIV-negative patient, with bone involvement and progression to anaplastic histotype. At the age of 22, violaceous patches of KS appeared on his feet. At the age of 50, he noted the appearance of a violaceous firm nodule on his right wrist. The lesions grew rapidly and became ulcerated. Radiotherapy led to a complete remission of symptoms. At the age of 55, a subcutaneous nodule developed on the proximal third of the right forearm associated with a wide painful edema of the right forearm and the proximal third of the right arm. The nodule enlarged rapidly, and an X-ray of the right forearm revealed the presence of a large osteolytic area of the ulna. A biopsy specimen from the right ulna showed bone erosion by a mesenchymal neoplasia with a high degree of malignancy. The right arm was amputated, and histologic examination of the surgical material confirmed the diagnosis of undifferentiated spindle-cell malignant neoplasia strongly positive for factor-VH-related antigen and CD34 antigen. Three years after surgical treatment, no recurrences have been observed.

The term lymphoepithelioma-like carcinoma identifies a group of nasopharingeal epithelial tumors characterized by aggregates of malignant undifferentiated cells surrounded by a dense reactive lymphoplasmacellular infiltrate. Primary cutaneous localization is rare, with approximately 30 cases reported in literature. We describe a case of primary lymphoepithelioma-like carcinoma of the skin in a 92-year-old woman. Immunohistochemical examination was positive for cytokeratine (KL1 and EMA) as regards epithelial cells, while the lymphocitic infiltrate was positive for LCA and CD3. In situ hybridization for Epstein Barr virus in tumor cells was negative. Electron microscopy showed rounded and occasionally spindle-shaped poorly-differentiated squamous epithelial cells, and a lymphoid stroma consisting mostly of normal-appearing small lymphocytes. Examination of the nasopharynx did not show any tumoral mass and after a 7 years follow-up the patient is free of local and distant recurrences. This tumor affects people aged over 50 years and is localized to the face, but scalp, shoulder and forearm may be involved. Research of Epstein-Barr virus is always negative in this tumor, unlike nasopharingeal epithelial carcinoma. The differential diagnosis of lymphoepithelioma-like carcinoma of the skin may present some difficulties and includes squamous cell carcinoma. Lymphoepithelioma-like carcinoma of the skin is a malignant neoplasm which tends to relapse locally and has a moderate tendency to metastatize.